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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1100-0111-0001 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:16

%S 1,1,1,1,1,1,1,1,199,377,3217,8011,104473,273171,9678777,30911627,

%T 4517322323,18623780151,3664520343941,18523730792349,4450318556374425,

%U 27331408113246915

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1100-0111-0001 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.0.0

%e .0.1.0.0.0.0.0.1.0

%e .1.1.0.0.0.0.0.1.1

%e .0.1.1.1.0.1.1.1.0

%e .1.0.0.1.0.1.0.0.1

%e .1.1.1.0.0.0.1.1.1

%e .0.0.1.1.0.1.1.0.0

%e .0.0.1.0.0.0.1.0.0

%K nonn

%O 1,9

%A _R. H. Hardin_, Nov 04 2008